US20120140086A1 - Image pickup apparatus including image shake correction - Google Patents
Image pickup apparatus including image shake correction Download PDFInfo
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- US20120140086A1 US20120140086A1 US13/371,831 US201213371831A US2012140086A1 US 20120140086 A1 US20120140086 A1 US 20120140086A1 US 201213371831 A US201213371831 A US 201213371831A US 2012140086 A1 US2012140086 A1 US 2012140086A1
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- shake
- image pickup
- image
- correction amount
- shake correction
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
- G02B27/646—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
- H04N23/681—Motion detection
- H04N23/6812—Motion detection based on additional sensors, e.g. acceleration sensors
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
- H04N23/682—Vibration or motion blur correction
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
- H04N23/682—Vibration or motion blur correction
- H04N23/685—Vibration or motion blur correction performed by mechanical compensation
- H04N23/687—Vibration or motion blur correction performed by mechanical compensation by shifting the lens or sensor position
Abstract
An image pickup apparatus includes a first detection unit for detecting a rotation shake, a first computation unit for processing a detection signal of the rotation shake into a rotation shake correction target value, a second detection unit for detecting a parallel shake in a plane surface perpendicular to an optical axis, a second computation unit for process a detection signal of the parallel shake into a parallel shake correction target value, a shake correction unit for correcting an image shake in the plane surface of the image pickup apparatus based on the rotation and parallel shake correction target values, an initialization unit for initializing the parallel shake correction target value, and a control unit for moving the shake correction unit based on an image pickup start instruction prior to an image pickup operation while initializing the parallel shake correction target value.
Description
- This application is a Divisional of U.S. application Ser. No. 11/952,945, filed Dec. 7, 2007 which claims priority to Japanese Application No. 2006-335064 filed Dec. 12, 2006, which are hereby incorporated by reference herein in their entirety.
- 1. Field of the Invention
- The present invention relates to an image pickup apparatus including a shake correction unit arranged to correct an image shake.
- 2. Description of the Related Art
- In modern cameras, important operations for image capture such as exposure and focus determination are automated, and the possibility for an unskilled photographer to cause an image pickup failure is extremely small. Also, recently, a camera provided with a system for preventing hand-induced image shake has been manufactured, and there are even fewer any factors for inducing the image pickup failure from the photographer.
- Here, the known system for preventing image shake will be described. A camera hand movement at the time of image pickup is a vibration with a frequency of 1 to 10 Hz in usual cases. Then, in order to realize the image pickup of a photograph without being influenced by image shake even when such a hand movement is generated at the time of shutter release, it is necessary to detect the camera shake due to the hand movement and displace a shake correction unit provided with the correction optical system in accordance with the detected value.
- Therefore, in order to capture the photograph without being influenced by image shake even when a camera shake is generated, first, it is necessary to detect the camera vibration precisely. Second, it is necessary to correct an optical axis change due to the hand-induced camera shake. The detection of the vibration (camera shake) can be performed in principle by detecting an acceleration, an angular acceleration, an angular rate, an angular displacement, and the like, and providing the camera with a processing or computation unit arranged to appropriately perform computation processing on the outputs. Then, based on the detection information, the shake correction unit for decentering the image pickup optical axis is driven to perform image shake correction.
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FIG. 22A andFIG. 22B are a plan view and a lateral view of a conventional single-lens reflex camera, respectively. An image stabilizing system mounted to aninterchangeable lens 90 which is attached to this single-lens reflex camera is arranged to perform the shake correction for a camera vertical shake and a camera lateral shake as illustrated inarrows optical axis 91. It is noted that the cameramain body 93 includes arelease member 93 a, a mode dial (including a main switch) 93 b, aretractable strobe light 93 c, and acamera CPU 93 d. In addition,reference numeral 94 denotes an image pickup element. -
Reference numeral 95 denotes a shake correction unit arranged to perform the correction for the shakes in directions ofarrows correction lens 95 a functioning as a correction optical system in direction ofarrows Reference numerals arrows - Signals output from the
gyros lens CPU 97 and converted into shake correction target values of theshake correction unit 95. In synchronism with a switch to be turned ON through a half press of therelease member 93 a provided to the camera main body 93 (hereinafter referred to as switch S1: an operation switch arranged to instruct photometry and focusing for image pickup preparations), a drive target value is input to a coil of theshake correction unit 95 via adrive unit 98. With this configuration, the image shake correction is started. - In the image stabilizing system described with reference to
FIGS. 22A and 22B , thegyros arrows main body 93. However, the rotational movements about thearrows gyros - However, in the case of photography at an extremely close distance (in a photography condition where a photographing magnification ratio is high), the image degradation due to the parallel shakes illustrated in the arrows 11 pb and 11 yb cannot be ignored. For example, as in macro photography, a condition where the camera approaches an object at a distance of about 20 cm for picking up the image and a case where a focal distance in a photographic optical system is extremely large (for example, 400 mm) even when the object is located away from the camera by about 1 m are considered. In such cases, it becomes necessary to actively detect the parallel shake and drive the
shake correction unit 95. Japanese Patent Laid-Open No. 7-225405 discloses a technology in which an accelerometer for detecting acceleration is provided to detect a parallel shake, and together with an output of a separately provided accelerometer, theshake correction unit 95 is driven. -
FIGS. 23A to 23C illustrate image shake (image shift) amounts due to influences from the rotation shake and the parallel shake in a case of photography at an extremely close distance (1:1 magnification photography). Thehorizontal axis 101 represents an elapsed time after the camera is held, and thevertical axis 102 represents an image shake amount on theimage pickup element 94. Here, thewaveform 103 ofFIG. 23A illustrates a time change in the image shake amount due to the parallel shake (parallel image shake). Thewaveform 104 ofFIG. 23B illustrates a time change in the image shake amount due to the rotation shake (rotation image shake). Also, thewaveform 105 ofFIG. 23C illustrates the total image shake amount from the parallel shake and the rotation shake. FromFIGS. 23A to 23C , theparallel image shake 103 and therotation image shake 104 are changed over the elapsed time. However, particular attention should be given to the fact that theparallel image shake 103 is large in the case of photography at extremely close distances. Of course, theparallel image shake 103 has a small image shake amount when the object is far away or the photographing magnification ratio is small (while the zoom is set to the wide-angle end, for example). In the case of 1:1 magnification photography as inFIGS. 23A to 23C , theparallel image shake 103 causes a larger influence on the image degradation than therotation image shake 104. Then, as the photographing magnification ratio larger, the effect is further increased. In order to correct this parallel image shake with high accuracy, it is necessary to provide a shake correction unit having a large correction stroke with which the shake amount can be corrected. - In the conventional shake correction unit, only a correction stroke limited to the correction for the rotation shake about the image pickup optical axis is provided. However, it is necessary to ensure a larger correction stroke for the correction for the parallel shake in the plane surface perpendicular to the image pickup optical axis. In the 1:1 magnification photography of
FIGS. 23A to 23C , to correct both the rotation shake and the parallel shake at a high accuracy, a correction stroke at least two times larger than the conventional correction stroke is required. Here, the correction stroke and the size of the shake correction unit is in at least a proportional relation. This is because the shake correction unit (to be more specific, a correction lens) needs a twice larger stroke for performing spreading vibration with the optical axis set as the center and because the size of an actuator (a coil, a magnet, or the like) is accordingly enlarged and a drive margin is required. As a result, the weight increase of the actuator and the cost increase become also significant. As described above, if parallel shake is intended to be corrected in an application of the conventional method, the cost and weight increases are a disadvantage for apparatus intended for a normal consumer. - The present invention has been made in view of the above-described problems and the invention provides an image pickup apparatus in which high precision correction can be preformed for parallel shake in a plane perpendicular to the optical axis, while a small size and a light weight of the image pickup apparatus are maintained.
- In order to achieve the above-described configuration, according to an aspect of the present invention, there is provided an image pickup apparatus including a first detection unit arranged to detect a rotation shake generated in the image pickup apparatus; a first processing unit arranged to process a detection signal of the rotation shake into a rotation shake correction target value; a second detection unit arranged to detect a parallel shake in the image pickup apparatus in a plane perpendicular to the optical axis; a second processing unit arranged to process a detection signal of the parallel shake into a parallel shake correction target value; and a shake correction unit arranged to correct an image shake generated on an image plane of the image pickup apparatus based on the rotation shake correction target value and the parallel shake correction target value, the image pickup apparatus being characterized by further including: an initialization unit arranged to initialize the parallel shake correction target value; and a control unit arranged to instruct the initialization unit to initialize, based on an image pickup start instruction of the image pickup apparatus, prior to a photographing operation, the parallel shake correction target value to move the shake correction unit.
- Similarly, in order to achieve the above-described configuration, according to another aspect of the present invention, there is provided image pickup apparatus including a first detection unit arranged to detect a rotation shake in the image pickup apparatus; a first processing unit arranged to process a detection signal of the rotation shake into a rotation shake correction target value; a second detection unit arranged to detect a parallel shake in the image pickup apparatus in a plane perpendicular to the optical axis; a second processing unit arranged to process a detection signal of the parallel shake into a parallel shake correction target value; a distance detection unit arranged to detect a distance from the image pickup apparatus to an object; a shake correction unit arranged to correct an image shake generated on an image plane of the image pickup apparatus based on the rotation shake correction target value and the parallel shake correction target value; an initialization unit arranged to initialize an integrated shake correction target value which is obtained by integrating the rotation shake correction target value with the parallel shake correction target value; and an control unit arranged to instruct the initialization unit to initialize, based on an image pickup start instruction of the image pickup apparatus, in a case where the distance detected by the distance detection unit is shorter than a set value, prior to a photographing operation, the integrated shake correction target value to move the shake correction unit.
- Similarly, in order to achieve the above-described configuration, according to still another aspect of the present invention, there is provided image pickup apparatus including a first detection unit arranged to detect a rotation shake in the image pickup apparatus; a first processing unit arranged to process a detection signal of the rotation shake into a rotation shake correction target value; a second detection unit arranged to detect a parallel shake in the image pickup apparatus in a plane perpendicular to the optical axis; a second processing unit arranged to process a detection signal of the parallel shake into a parallel shake correction target value; a shake correction unit arranged to correct an image shake generated on an image plane of the image pickup apparatus based on the rotation shake correction target value and the parallel shake correction target value; a gain change unit arranged to change a gain of the parallel shake correction target value; and a control unit arranged to operate the shake correction unit to leave a correction leftover for the parallel shake by lowering the gain by the control unit until an image pickup start instruction of the image pickup apparatus is issued and to operate the shake correction unit to clear the correction leftover by setting the gain as 1 by the gain change unit after the image pickup start instruction is issued.
- Further features of the present invention will become apparent from the following description of exemplary embodiments with reference to the attached drawings.
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FIGS. 1A and 1B are a top view and a lateral view of a camera according to a first exemplary embodiment of the present invention, respectively. -
FIG. 2 is a block diagram of a circuit configuration example of the camera according to the first exemplary embodiment of the present invention. -
FIGS. 3A to 3C are explanatory diagrams for describing a gravity error applied to an accelerator according to the first embodiment of the present invention. -
FIGS. 4A and 4B illustrate a relation between time and the hand shake angle and a relation between time and the output of the accelerator according to the first exemplary embodiment. -
FIG. 5 is a flowchart illustrating operations of a main part of the camera according to the first exemplary embodiment of the present invention. -
FIGS. 6A to 6C show waveforms for describing problems of a parallel shake correction target value, a rotation shake correction target value, and an integrated shake correction target value before the first exemplary embodiment of the present invention is executed. -
FIGS. 7A to 7C illustrate waveform examples of the parallel shake correction target value, the rotation shake correction target value, and the integrated shake correction target value according to the first exemplary embodiment of the present invention. -
FIGS. 8A to 8C illustrate other waveform examples of the parallel shake correction target value, the rotation shake correction target value, and the integrated shake correction target value according to the first exemplary embodiment of the present invention. -
FIG. 9 is a flowchart illustrating operations for realizing the waveforms ofFIGS. 8A to 8C . -
FIGS. 10A to 10C illustrate waveform examples of the parallel shake correction target value, the rotation shake correction target value, and the integrated shake correction target value according to a second exemplary embodiment of the present invention. -
FIG. 11 is a flowchart illustrating operations of a main part of the camera according to the second exemplary embodiment of the present invention. -
FIGS. 12A to 12C illustrate other waveform examples of the parallel shake correction target value, the rotation shake correction target value, and the integrated shake correction target value, according to the second exemplary embodiment of the present invention. -
FIG. 13 is a flowchart illustrating operations for realizing the waveforms ofFIGS. 12A to 12C . -
FIG. 14 is a block diagram of another circuit configuration example of a camera according to the second exemplary embodiment of the present invention. -
FIG. 15 is a flowchart illustrating operations in a case of adopting the circuit configuration ofFIG. 14 . -
FIG. 16 is a block diagram of a circuit configuration example of the camera according to a third exemplary embodiment of the present invention. -
FIGS. 17A to 17C illustrate waveform examples of the parallel shake correction target value, the rotation shake correction target value, and the integrated shake correction target value, according to the third exemplary embodiment of the present invention. -
FIG. 18 is a flowchart illustrating operations for realizing the waveforms ofFIGS. 17A to 17C . -
FIGS. 19A to 19C illustrate waveform examples of the parallel shake correction target value, the rotation shake correction target value, and the integrated shake correction target value according to the third exemplary embodiment of the present invention. -
FIG. 20 is a block diagram of a circuit configuration example of the camera according to a fourth exemplary embodiment of the present invention. -
FIG. 21 is a flowchart illustrating operations of a main part of the camera according to the fourth exemplary embodiment of the present invention. -
FIGS. 22A and 22B are a top view and a lateral view of a conventional camera, respectively. -
FIGS. 23A to 23C are waveform diagrams for describing problems of a camera of a conventional example, respectively. - Preferred embodiments of the present invention will now be described in detail in accordance with the accompanying drawings.
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FIGS. 1A and 1B are a top view and a lateral view of a camera functioning as an image pickup apparatus according to a first exemplary embodiment of the present invention. A difference from the conventional example of -
FIG. 22A and 22B resides in that accelerometers 11 p and 11 y are provided. Accelerator detection axes of therespective accelerometers -
FIG. 2 is a block diagram of a processing unit performing processing on signals of parallel shakes detected by the parallel shake detectors (hereinafter referred to as accelerators) 11 p and 11 y, and rotation shakes detected by rotation shake detectors (hereinafter referred to as gyros) 96 p and 96 y. This processing is mainly performed by thelens CPU 97. It is noted thatFIG. 2 only illustrates signal processing for correcting image shake due to vertical shakes of the camera (therotation shake 92 p and the parallel shake 11 pb inFIG. 1B ). However, in actuality, a correction on an image shake due to lateral shakes of the camera (therotation shake 92 y and the parallel shake 11 yb inFIG. 1B ) is also subjected to signal processing. - In
FIG. 2 , a hand shake angular rate signal of thegyro 96 p is input to anamplification unit 12 p. In theamplification unit 12 p, the output of thegyro 96 p is not only amplified simply, but also a DC removal circuit for removing a DC component and a high frequency attenuation circuit for removing a high frequency noise component are provided (not shown). The output of theamplification unit 12 p is subjected to A/D conversion and taken into thelens CPU 97. The taken-in signal is subjected to numeric processing in thelens CPU 97, but herein the process is divided into blocks for sake of the description. - A rotation shake computing unit (hereinafter referred to as angular rate integration unit) 13 p performs first-order integration on the hand shake angular rate signal input from the
amplification unit 12 p to be converted into a rotation shake correction target value (hereinafter referred to as hand shake angle). The angularrate integration unit 13 p performs integration on high frequency components equal to or higher than about 0.1 Hz in usual cases in the hand shake angular rate signal to be converted into the hand shake angle. However, at the start of the angular rate integration, the integration zone can be narrowed (for example, a signal equal to or lower than 2 Hz can be attenuated). The activation of this signal processing is prompted (which is referred to as time constant switch). The obtained hand shake angle signal is input to anadder unit 14 p and added with a hand shake displacement signal, which will be described later, before being converted into a hand shake integrated signal. It is noted that theadder unit 14 p adds the hand shake angle signal with the hand shake displacement signal described later based on therelease member 93 a and a signal from afocus detection unit 27. Theadder unit 14 p receives the hand shake angle signal in response to a switch S1 which is turned ON through a half press operation of therelease member 93 a, and performs an addition of the hand shake displacement signal and the hand shake angle signal based on a signal input of the focus detection unit 27 (i.e. when the focusing completed). - The hand shake integrated signal is input to a frequency
characteristic change unit 15 p and a frequency characteristic is changed. The frequencycharacteristic change unit 15 p is arranged to mainly attenuate low frequency components of the hand shake integrated signal. The frequencycharacteristic change unit 15 p sets a frequency threshold with which frequencies lower than the threshold are determined to be attenuated (for example, 0.1 Hz, or 5 Hz) and the corresponding signal components are attenuated. This is because when a large change in the hand shake is caused as in a framing change in the camera, the attenuation of the hand shake integrated signal is set larger (for example, signals equal to or lower than 5 Hz are attenuated), and the shake correction is not performed. If the frequencycharacteristic change unit 15 p is not provided, even framing movements of the camera are subjected to the shake correction, and it is therefore impossible to perform satisfactory camera framing. - The output of the frequency
characteristic change unit 15 p is input to asensitivity change unit 16 p. Thesensitivity change unit 16 p receives signals from a focaldistance detection unit 18 and a photographingdistance detection unit 19 input to thelens CPU 97 to change the gain of the signal in the frequencycharacteristic change unit 15 p. - In general, a shake correction sensitivity of an optical system of the
shake correction unit 95 included in a zoom lens varies depending on the focal length or the focusing distance. For example, when theshake correction unit 95 is driven by 1 mm when the zoom is at the wide-angle end, the image on an image plane is also shifted by 1 mm. In this case, if theshake correction unit 95 is driven by 1 mm when the zoom is at the telephoto end, the image plane is shifted by 3 mm. Similarly, when an object is at an extremely close distance and when the object is at infinity, a relation between the drive amount of theshake correction unit 95 and the image shake amount changes. For that reason, in order to correct the sensitivity (for example, the gain is set one third when at the telephoto end), the gain of the signal of the frequencycharacteristic change unit 15 p is changed depending upon the focal length or the focusing distance. It is noted that the focal distance (length)detection unit 18 is provided in the lens and composed of an encoder or the like which detects the position of the lens which is moved when zooming. A focal distance is detected by an output of the encoder. In addition, the photographingdistance detection unit 19 is also provided in the lens and composed of an encoder or the like which detects a position of the lens which is moved when focusing. A photographing distance is detected by an output of the encoder. - In this manner, from the
sensitivity change unit 16 p, an integrated shake correction target value in which the hand shake angle signal (rotation shake correction target value) and the hand shake displacement signal (parallel shake correction target value) are added and frequency and gain processing are performed is output. - When the switch S1 is turned ON through the half press operation of the
release member 93 a, the integrated shake correction target signal from thesensitivity change unit 16 p is converted into a PWM signal and input to a shakecorrection drive unit 98 p. In the shakecorrection drive unit 98 p, theshake correction unit 95 is driven in accordance with the input PWM signal to perform the image shake correction. - At an early stage when the switch S1 is turned ON, only the hand shake angle signal is input to the
adder unit 14 p, and therefore only the correction for the rotation shake is performed. Also, in accordance with the switching ON of the switch S1, thefocus detection unit 27 in thecamera CPU 93 d drives afocus sensor 32 in the cameramain body 93 to detect the focus state of the photograph object. Then, based on the detection result of thefocus sensor 32, thefocus detection unit 27 sends the focus deviation amount to a lensdrive computation unit 33 in alens micro computer 97. The lensdrive computation unit 33 drives afocus drive unit 34 based on the signal to move afocus lens 99. Here, the correction for the rotation shake is performed while the above-described focus operation is performed, and it is therefore possible to realize the high precision focus operation. - After the drive of the
focus lens 99, thefocus sensor 32 detects the focus state of the object again. In a case of a sufficient focus state, the focus display is performed (in a case of the insufficient focus state, the lens is moved again). Also, when the sufficient focus state is achieved, the photographingdistance detection unit 19 instructs theadder unit 14 p via a photographingdistance corresponding unit 36 p to add the hand shake displacement signal with the hand shake angle signal. The feed amount of thefocus lens 99 is continuously input to thesensitivity change unit 16 p. Thesensitivity change unit 16 p sets the feed amount of the focus lens 99 (the signal of the photographing distance detection unit 19) when thefocus detection unit 27 is focused as a vibration control sensitivity value. - Here, the photographing
distance corresponding unit 36 p receives the output of the photographingdistance detection unit 19. Then, a signal for determining whether the signal (object distance) is subjected to the shake correction by adding the hand shake displacement signal with the hand shake angle signal (when the object distance is close, the hand shake displacement is added), and also a signal for determining whether initialization is necessary to be performed on a parallel shake correction targetvalue initialization unit 35 p, which will be described later, are output. - As will be described later, from the positional relation between the feed amount of the focus lens and the zoom lens, the photographing magnification ratio is computed. However, the computation of the photographing magnification ratio is also started by using the focus detection of the
focus detection unit 27 as a trigger based on the signals of the focal distance (length)detection unit 18 and the photographingdistance detection unit 19. That is, after the zoom is set and the focus is on the photograph object, when the feed amount of the focus lens is found out, the sensitivity for the rotation shake is found out and the integrated shake correction target value is calculated. It is noted that the zoom is set by the photographer before the half press operation of therelease member 93 a is performed. The image magnification factor is also found out when the focus is set on the photograph object. - The shake correction amount target signal obtained in the above-described manner to which the hand shake angle signal and the hand shake displacement signal are added is converted into a PWM signal and input to the shake
correction drive unit 98 p. In the shakecorrection drive unit 98 p, theshake correction unit 95 is driven in accordance with the input PWM signal to perform the image shake correction. That is, such a configuration is adopted that the correction for the parallel shake is also performed when the focusing is ended. - Next, a description will be provided of signal processing or the
accelerometer 11 p. The hand shake acceleration signal of theaccelerometer 11 p is input to anamplification unit 20 p. In theamplification unit 20 p, the output of theaccelerometer 11 p is not only amplified, but also a DC removal circuit for removing a DC component and a high frequency attenuation circuit for removing a high frequency noise component are provided. The output of theamplification unit 20 p is subjected to A/D conversion and taken into thelens CPU 97. The taken-in hand shake acceleration signal is also subjected to numeric processing in thelens CPU 97, but herein the process is also divided into blocks for sake of the description. - First, the hand shake acceleration signal is input to an acceleration
gravity correction unit 21 p and the correction for gravity components is performed. Now, the correction for gravity components is described. At an image pickup position of the camera illustrated inFIG. 1B , the camera is set horizontal, and thus the sensitivity direction 11 pa of theaccelerometer 11 p faces the same direction as a gravity direction 28 (refer toFIG. 3A ). At this time, theaccelerometer 11 p regularly outputs signals which reflect the gravity components, and the detection of parallel shake components superimposed upon the gravity components. Here, as the signal outputs of the gravity components are DC components, the gravity signal outputs can be removed by the DC removal circuit or the like in theamplification unit 20 p. - However, due to the change in the rotation angle of the hand shake generated when the camera is held, as illustrated in a broken line in
FIG. 3A , the position of theaccelerometer 11 p is changed. Thus, the gravity direction is changed when viewed from theaccelerometer 11 p. For that reason, the output of theaccelerometer 11 p is changed due to the change in the hand shake angle. -
FIG. 3C illustrates a change in the output of theaccelerometer 11 p with respect to an orientation of theaccelerometer 11 p. The lateral axis represents an orientation change of theaccelerometer 11 p (hand shake rotation angle θ) and the vertical axis represents an output of theaccelerometer 11 p. Awaveform 30 p represents the output of theaccelerometer 11 p. When the orientation angle of theaccelerometer 11 p is changed from 0 (in a state where 1 G is applied as inFIG. 3A ) through the orientation change of ±θ, the output of theaccelerometer 11 p is accordingly changed (decreased). -
FIGS. 4A and 4B illustrate outputs of theaccelerometer 11 p due to gravity change, in which the lateral axis represents an elapsed time after the camera is held and the vertical axis alternately represents the hand shake angle and the output of the accelerator. - At this moment, even if the parallel shake is not generated at all, the accelerator outputs an
error signal 30 p due to the influences of the gravity component change by the handshake rotation angle 29 p. In a case of close distance image pickup, the cameral is faced down for the image pickup in many cased.FIG. 3B illustrates such a case where agravity direction 28 is perpendicular to the sensitivity direction 11 pa of theaccelerometer 11 p. The error signals in this case are represented by broken lines inFIGS. 3C and 4B . - Here, the arrangement of the
accelerometer 11 p inFIG. 3A and the arrangement of theaccelerometer 11 p in FIG. 3B generate a difference in the size of error signals 30 p and 31 p. This is because an influence of the gravity by cosine is generated in the arrangement ofFIG. 3A with respect to the change in the hand shake angle and an influence of the gravity by sine is generated in the arrangement ofFIG. 3B . When the orientation change angle is small, the change by sine is large. For that reason, in order to correct this influence of the gravity, it is necessary to detect the hand shake angle and find out the orientation of theaccelerometer 11 p (the sensitivity angle is at which angle with respect to the gravity as in the difference betweenFIGS. 3A and 3B ). - Returning to
FIG. 2 , thelens CPU 97 receives the ON signal of the switch S1 in accordance with the half press operation is input from therelease member 93 a via thecamera CPU 93 d. The half press of therelease member 93 a is an operation performed after the photograph composition is determined for the image pickup preparations. After the operations, the photometry for the object and the focus operation are started. InFIG. 2 , the above-described operations are not directly related to the invention and thus are omitted. The ON signal of the switch S1 is input to an initial orientationdirection detection unit 23 p. The acceleration amplification signal from theamplification unit 20 p also is input to the initial orientationdirection detection unit 23 p, and the orientation of theaccelerometer 11 p is determined based on the size of the acceleration amplification signal when the ON signal of the switch S1 is input. - As the half press of the
release member 93 a is the operation performed after the photographer determines the composition, there is no large change in the orientation. For that reason, it is effective to determine the orientation of theaccelerometer 11 p based on the ON signal of the switch S1 in accordance with the operation. Of course, after the switch S1 is turned ON and focusing is performed in the camera, the orientation may be detected, but in that case, the integration on the output of theaccelerometer 11 p (described later) cannot be performed while the time from the turning of ON of the switch S1 to achieve focus is utilized. For saving time, it is desirable to detect the orientation of theaccelerometer 11 p at the time of turning ON of the switch S1. The determination on the orientation of theaccelerometer 11 p is performed in the following manner. When the acceleration at the time of turning on the ON signal of the switch S1 is 1 G, theaccelerometer 11 p corresponds to the orientation ofFIG. 3A . When the acceleration is 0 G, theaccelerometer 11 p corresponds to the orientation ofFIG. 3B . When the acceleration is between 0 G and 1 G, theaccelerometer 11 p is determined to correspond to the orientation depending on the value. - The hand shake angle signal from the angular
rate integration unit 13 p is input not only to the above-describedadder unit 14 p but also to a gravityinfluence calculation unit 24 p. The gravityinfluence calculation unit 24 p calculates the change in the force due to gravity applied to theaccelerometer 11 p based on the change in the hand shake angle. However, as described above, the calculation method varies depending on the orientation of the gravitational force with respect to theaccelerometer 11 p (whether the calculation is performed by sine or cosine). For that reason, the signal of the initial orientationdirection detection unit 23 p is also input to the gravityinfluence calculation unit 24 p, and the coefficient for the calculation is changed in the orientation ofFIG. 3A and the orientation ofFIG. 3B . To be more specific, when an orientation φ to which 1 G is applied as inFIG. 3A is set as 0 degree and a change in the orientation is set as θ, the change in the output of theaccelerometer 11 p can be obtained from G (COS φ−COS(φ+θ)). For that reason, φ is obtained by the initial orientationdirection detection unit 23 p and θ is obtained by the hand shake angle to be used for the gravity influence calculation. - The hand shake acceleration amplification signal from the
amplification unit 20 p is input to the accelerationgravity correction unit 21 p, a difference to the signal change of theaccelerometer 11 p in accordance with the gravity change found out in the gravityinfluence calculation unit 24 p is calculated. Then, the output error of theaccelerometer 11 p due to the influence of gravity is removed. The hand shake acceleration output from which the error component is removed is input to a parallel shake computation unit (hereinafter referred to as acceleration integration unit) 22 p. Theacceleration integration unit 22 p performs second-order integration on the hand shake acceleration signal in which the influence of the gravity is corrected, which is input from the accelerationgravity correction unit 21 p, to be converted into a parallel shake correction target value (hereinafter referred to as hand shake displacement). Theacceleration integration unit 22 p performs second-order integration on high frequency components equal to or higher than 0.4 Hz in usual case among the hand shake acceleration signals similarly to the angularrate integration unit 13 p, to be converted into the hand shake displacement. In theacceleration integration unit 22 p, the integration zone of the acceleration signal is narrowed at the start of the integration (for example, the integration is performed on only components equal to or higher than 1 Hz) and thus the activation of this signal processing is prompted to the user (for example by a time constant switch). - The hand shake displacement signal of the
acceleration integration unit 22 p is input to an image magnificationratio correction unit 25 p. A photographing magnificationratio computation unit 26 p calculates the photographing magnification ratio based on focal distance (i.e. focal length) information obtained by the focal distance (focal length)detection unit 18 and photographing distance (i.e. focusing distance) information obtained by the photographingdistance detection unit 19. As described above, the focal distance (focal length)detection unit 18 is provided in the lens, and is composed of an encoder or the like which detects the position of the lens moving during zooming. The focal distance (focal length) is detected by an output of the encoder. In addition, the photographingdistance detection unit 19 is also provided in the lens. The photographingdistance detection unit 19 is composed of an encoder or the like which detects the position of the lens moving during focusing. The photographing distance is detected by an output of the encoder. - As described above, the movement of the
focus lens 99 is performed by thefocus drive unit 34. After the movement is completed, when thefocus detection unit 27 confirms the focused state, the photographing magnificationratio computation unit 26 p performs the computation of the photographing magnification ratio based on the outputs of the focal distance (focal length)detection unit 18 and the photographingdistance detection unit 19. The influences on the screen from the parallel shakes 11 pb and 11 yb become large when the object is close and a photographing focal length is large (when the photographing magnification ratio is high), and the influences on the screen hardly occur when the object is far away (when the photographing magnification ratio is low). For that reason, it is necessary to amplify the hand shake displacement detected and computed by theaccelerometers - The image magnification
ratio correction unit 25 p performs the amplification of the hand shake displacement in theacceleration integration unit 22 p based on the computed value of the photographing magnificationratio computation unit 26 p (when the focal length is long and the object distance is close, the photographing magnification ratio is computed to be high). The output of the image magnificationratio correction unit 25 p is input to the parallel shake correction targetvalue initialization unit 35 p. The parallel shake correction targetvalue initialization unit 35 p initializes the parallel shake correction target value, when the image pickup start instruction is issued. That is, the output of the parallel shake correction targetvalue initialization unit 35 p becomes 0 at the time of the full press operation of therelease member 93 a, and thereafter the output target value is continuously provided. Alternatively, the parallel shake correction targetvalue initialization unit 35 p sets the parallel shake correction target value to a predetermined value (for example, 90% of the entire range of the parallel shake correction target value) at the time of the full press operation of therelease member 93 a, and thereafter the output target value may be continuously provided. - It is noted that the signal of the photographing
distance corresponding unit 36 p is also input to the parallel shake correction targetvalue initialization unit 35 p. Only when the photographing distance is closer than the set value (for example, the photographing distance is 30 cm), the parallel shake correction targetvalue initialization unit 35 p is operated to provide an output target value. This operation may be controlled not only with the object distance but alternatively or in addition with the photographing magnification ratio. Only when the photographing magnification ratio becomes larger than a predetermined value is the parallel shake correction targetvalue initialization unit 35 p operated to provide an output target value. - The
adder unit 14 p adds the signal of the angularrate integration unit 13 p with the signal of the parallel shake correction targetvalue initialization unit 35 p. As described above, when the object is far and the photographing focal length is short, substantially only the output of the angularrate integration unit 13 p is generated. The subsequent operations after theadder unit 14 p are the same as described above. In accordance with the frequencycharacteristic change unit 15 p and the sensitivity of the optical system for facilitating the framing change for the camera, the shake correction target value is obtained through thesensitivity change unit 16 p for adjusting the effectiveness of the image shake correction. Then, theshake correction unit 95 is driven. -
FIG. 5 is a flowchart illustrating a series of operations in the above-described configuration. This flow is started when a main power supply of the camera is turned ON. It is noted that for comprehensively describing the main configuration of the present invention, various control steps provided in the camera (for example, manipulations, operations, etc., for battery check, photometry, ranging, lens drive for AF, flash lamp charge, and image pickup) are omitted. Also, in the following flow, a description will be provided of a case as an example where the rotation shake and the parallel shake 11 pb of thecamera 92 p are detected by thegyro 96 p and theaccelerometer 11 p. However, a similar flow is applied also in a case where the rotation shake of thecamera 92 y and the parallel shake 11 yb are detected by using thegyro 96 y and theaccelerometer 11 y. - Referring to
FIG. 5 , inStep # 1001, the flow stands by until turning ON of the switch S1 through the half press operation of therelease member 93 a, and when the switch S1 is turned ON, the flow is advanced to Step #1002. InStep # 1002, the initial orientationdirection detection unit 23 p detects the orientation of the camera by way of theaccelerometer 11 p. This operation is to detect the gravity force (acceleration) applied to theaccelerometers FIGS. 1A and 1B , in a case where the camera is horizontally held, theaccelerometer 11 p outputs 1 G and theaccelerometer 11y outputs 0 G. In this state, when the camera is vertically held (this case corresponds to the horizontal state but the composition is set vertical), theaccelerometer 11 p outputs 0 G and theaccelerometer 11y outputs 1 G. In addition, in a case where the camera is held downward or upward, theaccelerometers - A reason why the orientation is detected at the timing of the half press operation of the
release member 93 a is that as the photographer holds the camera to determine the framing and performs the half press operation of therelease member 93 a after the stability is attained, the change in the orientation afterwards is small. In a case where the orientation ofFIG. 1A is determined based on theaccelerometers accelerometer 11 p. However, the gravity influence calculation unit 24 y determines that the gravity correction is not performed on the output of theaccelerometer 11 y, and the correction amount of the gravity acceleration correction unit 21 y is set as 0. This is because the gravity acceleration due to the rotation shake originally does not exist. That is, an acceleration gravity correction unit 21 y (although not shown, having a similar configuration to the accelerationgravity correction unit 21 p to correct the gravity influence of theaccelerometer 11 y) does not perform the correction for gravity components on the amplification signal of theaccelerometer 11 y. - On the other hand, in a case where the camera is held vertically (the
accelerometer 11 p=0 G, theaccelerometer 11 y=1 G), the gravity correction of theaccelerometer 11 y is performed based on the signal of thegyro 96 y. However, the gravity correction of theaccelerometer 11 p is not performed based on the signal of thegyro 96 p. That is, the gravityinfluence calculation unit 21 p sets the correction amount of the gravityacceleration correction unit 21 p as 0. In a case where the camera is held downward or upward (theaccelerometer 11 p=±1, theaccelerometer 11 y=±1 G), the gravity correction of theaccelerometer 11 p is performed based on the signal of thegyro 96 p is performed, and the gravity correction of theaccelerometer 11 y is performed based on the signal of thegyro 96 y. - As described above, it is determined whether the gravity correction is performed in accordance with the orientation. It is noted that not only the gravity acceleration but also the acceleration due to the parallel shake are superimposed in the signals from the
accelerometers accelerometers - When the orientation detection is ended as described above, the flow is advanced to Step #1003, and the sensitivity correction conforming to the lens state and the frequency correction conforming to the shake state (panning, etc.) are performed with respect to the hand shake angle signal. Next in
Step # 1004, the rotation shake correction based on the hand shake angle signal is started. Subsequently inStep # 1005, based on the orientation of the camera detected by the initial orientationdirection detection unit 23 p and the hand shake angle information from the angularrate integration unit 13 p, the gravityinfluence calculation unit 24 p calculates the gravity acceleration signal included in the signal from theaccelerometer 11 p and the accelerationgravity correction unit 21 p corrects the output accordingly. - Next in
Step # 1006, the focusing operation is started. Then, next inStep # 1007, the flow stands by until completion of the lens movement for focusing. That is, thefocus detection unit 27 detects the focus state of the object by using thefocus sensor 32, and the lensdrive computation unit 33 computes the focus lens drive amount. After that, the flow stands by until thefocus sensor 32 confirms that the object is focused again after thefocus lens 99 is driven by thefocus drive unit 34. Subsequently, inStep # 1008, when the lens movement is completed inStep # 1007, the movement amount of the lens is read by a focus encoder to detect a photographing distance (object distance). - Next in
Step # 1009, focal length information of the lens is detected from a zoom encoder functioning as the focal distance (focal length)detection unit 18, and from the relation with the photographing distance obtained inStep # 1008, the photographing magnificationratio computation unit 26 p computes the photographing magnification ratio. Then, the image magnificationratio correction unit 25 p changes the gain of the hand shake displacement in theacceleration integration unit 22 p based on the result of the photographing magnificationratio computation unit 26 p. Theadder unit 14 p adds the result with the hand shake angle signal from the angularrate integration unit 13 p, and the frequencycharacteristic change unit 15 p changes the shake correction frequency band in accordance with the photographing state or user settings. The gain of the output afterwards is changed by thesensitivity change unit 16 p based on the vibration control sensitivity obtained by the above-described focal distance (focal length)detection unit 18 and the photographingdistance detection unit 19, and the shake correction target value is calculated. - Next in
Step # 1010, based on the obtained shake correction target value, theshake correction unit 95 is driven to perform the image shake correction. At this point, corrections for both the rotation shake and the parallel shake are performed for the first time. Next inStep # 1011, the state of the switch S2 is checked. When turning OFF of the switch S2 is detected, the flow is advanced to Step #1017, where whether turning OFF of the switch S1 is checked. At this time, when turning ON of the switch S1 is continued, the flow is returned toStep # 1006, the similar operation is continued. That is, as long as turning ON of the switch S1 is continued, while the gain of the shake correction target value is changed conforming to the image magnification factor and the sensitivity which change in accordance with the photographing distance (the object distance), the image shake correction is continued. During that period, there is no change in the orientation of theaccelerometer 11 p for the gravity correction. It is noted that when the lens is in the focused state, the focus drive of the lens is not performed. When the focused state is not detected (for example, when the position of the object is moved), the lens is driven inStep # 1007 to perform the focus operation. Next inStep # 1008, the photographing distance is detected again to calculate the photographing magnification ratio. - When turning ON of the switch S2 is detected in the above-described
Step # 1011, the flow is advanced to Step #1012, where the photographing magnification ratio is determined. As the result of the determination, when the photographing magnification ratio is equal to or larger than a predetermined value, the flow is advanced to Step #1013. Prior to a photographing operation, the parallel shake correction targetvalue initialization unit 35 p is operated. This operation inStep # 1013 will be described later based onFIGS. 6A to 6C andFIGS. 7A to 7C . When the photographing magnification ratio is not equal to or larger than the predetermined value, the flow skipsStep # 1013 and is advanced to Step #1014. That is, when the photographing distance is far (or the photographing magnification ratio is small) due to the photographingdistance corresponding unit 36 p, inStep # 1013 the parallel shake correction targetvalue initialization unit 35 p is not operated and the flow is advanced to Step #1014. - In
Step # 1014, image pickup is performed. When the image pickup is ended, the flow is advanced to Step #1015, the parallel shake correction target value is returned to the value before the initialization (only when the parallel shake correction target value is initialized). This will be also described in detail based onFIGS. 7A to 7C . Next inStep # 1016, whether the switch S2 is turned OFF is checked. In the case where the switch S2 is not turned OFF, the flow waits atStep # 1016. After that, when the switch S2 is turned OFF, the flow is advanced to Step #1017, where the state of the above-described switch S1 is determined. InStep # 1017, when it is detected that the switch S1 is also turned OFF, the flow is advanced to Step #1018, where the drive of theshake correction unit 95 is stopped. Then, the flow is returned toStep # 1001, and the flow stands by until turning ON of the switch S1 again. - As described above, according to the first exemplary embodiment, such a configuration is adopted that the correction for the rotation shake is performed first (#1004), and only after the focus state is achieved is the correction for the parallel shake performed (#1010). In this manner, as the correction for the rotation shake is performed prior to the focus operation, the focus accuracy can be increased, and also the information used for performing the parallel shake correction (the photographing magnification ratio) can be accurately obtained.
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FIGS. 6A to 6C are explanatory diagrams for describing changes in drive target values of theshake correction unit 95 for correcting the image shake due to the input parallel shake and rotation shake. The hand-induced shake in thetime axis 0±0.5 seconds inFIGS. 23A to 23C is magnified, and variation of the target value therefor is illustrated. Thelateral axis 51 represents an elapsed time since the camera is held similarly toFIGS. 23A to 23C . The vertical axes 52 (52 a to 52 c) respectively represent a change in the target value.Broken lines shake correction unit 95. Theshake correction unit 95 cannot be moved beyond this correction limit line. For this reason, the output of the shake correction target value beyond the limit range is also limited. - It is noted that in
FIGS. 6A to 6C , the half press operation of therelease member 93 a for the image pickup preparations is already executed. For that reason, the shake correction target value in accordance with the shake is output.FIG. 6A illustrates a fluctuation in the parallel shake correction target value for correcting the parallel shake. Thevertical axis 52 a represents the parallel shake correction target value, andreference numeral 53 represents a waveform thereof.FIG. 6B illustrates a fluctuation in the rotation shake correction target value for correcting the rotation shake. Thevertical axis 52 b represents the rotation shake correction target value, andreference numeral 54 represents a waveform thereof.FIG. 6C illustrates a combined shake correction target value obtained through addition of the above-described values. Thevertical axis 52 c represents the combined shake correction target value, andreference numeral 55 represents a waveform thereof. Based on thewaveform 55, theshake correction unit 95 is driven to suppress the image shake.Reference numeral 56 represents the time when an image pickup command is received (turning ON of the switch S2, corresponding to t=0).Reference numeral 57 represents an image pickup time period. In the present example, the period is set as about 1/15 second. - Here, as illustrated in
FIG. 6A , it is understood that thewaveform 53 of the parallel shake correction target value sometimes exceeds thecorrection limit 59. At such a time, theshake correction unit 95 uses up the correction stroke, and thus the image shake correction cannot be performed. Then, as the timing is overlapped with theimage pickup period 57, a satisfactory image can not be obtained upon image pickup. In contrast, the rotation shake ofFIG. 6B does not exceed thecorrection limit FIG. 6C , at the time of the image pickup, theshake correction limit 59 is already exceeded, and even the correction for the rotation shake cannot be performed. - Similarly to the conventional camera, if only the correction for the rotation shake is performed, the above-described problem is not encountered. However, when the parallel shake is also corrected by the same
shake correction unit 95, due to the large parallel shake, theshake correction unit 95 exceeds the correction limit, and even the rotation shake cannot be corrected. -
FIGS. 7A to 7C are explanatory diagrams for describing a detail of the parallel shake correction target value initialization described inStep # 1013 ofFIG. 5 for solving the above-described problems. Same components as those inFIGS. 6A to 6C are allocated with the same reference numerals. Herein, a difference fromFIG. 6A resides in that when thewaveform 53 of the parallel shake correction target value is at the time t=0 (at the time of the image pickup start (turning ON of the switch S2)), the output is initialized to be set as 0 (i.e. brought back or reset to zero), and after this, outputs are continuously varied again as before to correct for further shake after t=0. - Here, the initialization of the above-described parallel shake correction target value will be described. The parallel shake correction target value at the time of the full press operation of the
release member 93 a (turning ON of the switch S2) is set as V0. The parallel shake correction targetvalue initialization unit 35 p stores this value as $V0. The parallel shake correction target values afterwards V1, V2, V3 . . . Vn are converted into an initialized parallel shake correction target value Vex at the time of the image pickup through the following expression. -
Vexn=Vn−$V0 - In this manner, when a certain value $V0 functioning as a bias offset is added to the parallel shake correction target value, at the time of the turning ON of the switch S2, the value becomes 0 in the following expression and successive outputs afterwards have the same value subtracted.
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Vex0=V0−$V0 - Regarding the rotation shake of
FIG. 7B , the rotation shake correction target value similar toFIG. 6B is used. However,FIG. 7C illustrates the total value of the parallel shake correction target value and the rotation shake correction target value. The combined shake correction target value that is actually a drive target value of theshake correction unit 95 does not reach the correction limit in theimage pickup period 57. In this way, as theshake correction unit 95 does not reach a photographing limit in the image pickup period, it is possible to perform appropriate image shake correction. - It is noted that in
Step # 1012 ofFIG. 5 , only in a case where the photographing magnification ratio is equal to or larger than the predetermined value, inStep # 1013, is the parallel shake correction target value initialized (set as 0 at the time of the image pickup start). This is because the parallel shake amount of awaveform 103 inFIGS. 23A to 23C is extremely small when the photographing magnification ratio is small (when an image pickup condition where the object distance is close is not applied mainly such as macro photography). Therefore, theshake correction unit 95 for the parallel shake correction does not often exceed the correction range. - In this manner, the reason why the parallel shake correction target value is not initialized in synchronism with the image pickup start when the object distance is far away is as follows. When the parallel shake correction target value is set as 0 to perform the initialization operation, the
shake correction unit 95 performs an abrupt displacement in response to the operation. After that, it takes some time for theshake correction unit 95 to be stabilized. The parallel shake correction target value is not initialized unnecessarily for a purpose of suppressing the delay of the release time lag for that reason. - As is understood from
FIG. 7A , after the end of the image pickup period 57 (i.e. after 1/15 second), the parallel shake correctiontarget value waveform 53 is returned to the waveform before the image pickup (before the initialization) again (Step # 1015 ofFIG. 5 ). At the time of the image pickup, the parallel shake correction target value is initialized. As described above, at the time of the image pickup start, the bias offset value $V0 is subtracted from the parallel shake correction target value so that the value becomes 0. For that reason, the parallel shake correction target value is within the shake correction limit during a short period of time after the initialization. However, on the other hand, after the elapsed of the above-described period, the correction limit is exceeded at many times (because the parallel shake correction target value becomes asymmetrical with respect to the center). - In view of the above, in synchronism with the completion of image pickup, the bias offset value $V0 is removed. When the parallel shake correction target value is set as V15 after 1/15 second, the initialized parallel shake correction target value is found out through the following expression, but Vex15 is not used for outputs afterwards and V16 is set again.
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Vex15=V15−$V0 - It is noted that herein, at the time of the image pickup start, the parallel shake correction
target value waveform 53 need not be returned all the way to 0, but could be shifted towards 0. This is because the image pickup period is sufficiently short as compared with the composition checking period (a period from the focused state to the image pickup inFIG. 6A ) in general, and it suffices that the parallel shake correction target value does not exceed the correction limit during the period. Hereinafter, a modified example of the above-described embodiment will be described. - In general, if about 10% of the correction stroke is left, the
shake correction unit 95 does not use up the correction stroke during theimage pickup period 57. Therefore, at the time of the image pickup start, if the parallel shake correctiontarget value waveform 53 is reduced to be within 90% of the correction entire stroke, there are no bad influences on the image pickup in most cases. Accordingly, the movement of the image on the image pickup device, or fluctuation of the composition at the time of the image pickup, can be decreased. That is, at the time of the image pickup start, in a case where the parallel shake correction target value is within 90% of the entire correction stroke, the correction target value is directly used. Only in a case where the shake is the parallel shake correction target value is greater than 90% of the maximum stroke, the correction stroke may be limited so that the parallel shake correction target value is within 90% of the correction stroke. It is noted that the center of the shake correction range or the predetermined range within 90% can be selectively set as the initialization range. -
FIGS. 8A to 8C illustrate waveforms for explaining the above-described configurations. The same components as those inFIGS. 6A to 6C andFIGS. 7A to 7C are allocated with the same reference numerals. The parallel shake correction target value (the waveform 53) ofFIG. 8A is initialized to a value at which about 10% is left before thecorrection limit 59 at the image pickup starttime point 56. Now, when the correction limit value is set as Vlim, the initialized parallel shake correction target value Vex0 of the image pickup starttime point 56 is found out through the following expression. -
Vex0=V0−$V0±0.9×Vlim - Here, a reason why ± is used is that when the parallel shake correction target value V0 at the time of the image pickup start is close to the
correction limit 59 on the minus side as inFIG. 6A , the following expression is established. -
Vex0=V0−$V0−0.9×Vlim - On the other hand, when the parallel shake correction target value V0 at the time of the image pickup start is close to the
correction limit 58 on the plus side as inFIG. 6A , the following expression is established. -
Vex0=V0−$V0+0.9×Vlim - For this reason, during the
image pickup period 57, the shake correction limit is not exceeded. - It is noted that the bias offset amount for the initialization ($V0) is small and the influence thereof is small, and therefore cancellation of the initialization (removal of the bias offset) is not performed after the image pickup. For that reason, a time saving can be realized as the operation is not performed, thus achieving a high speed system.
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FIG. 9 is a flowchart illustrating an example for describing the above-described operations, and is basically similar to the flowchart ofFIG. 5 . For that reason, the parts for performing the same operations are indicated by the same step numbers and a description thereof will be omitted. According to the flowchart ofFIG. 9 , Steps #1013 and #1015 in the flowchart ofFIG. 5 are omitted, and instead, Steps #1019 and #1020 are provided. - In
Step # 1011 ofFIG. 9 , the instruction of the image pickup start (turning ON of the switch S2) is performed. Next inStep # 1012, when it is determined that the object distance is close (i.e. the photographing magnification ratio is large), the flow is advanced to Step #1019. Then, in thisStep # 1019, it is determined whether the parallel shake correction target value at this moment is within 90% of the shake correction limit range. When the parallel shake correction target value is within 90%, it is unnecessary to initialize the parallel shake correction target value, and the flow is advanced to the image pickup inStep # 1014. On the other hand, when 90% of the shake correction limit range is exceeded or when the correction limit is exceeded, the flow is advanced to Step #1020. - In
Step # 1020, the initialization is performed so that the parallel shake correction target value is within 90% of the correction range (subtraction of the bias offset), and the integrated shake correction target value does not exceed the correction limit at the time of the image pickup. It is noted that the parallel shake correction target value is obtained in the acceleration integration unit (the parallel shake computation unit) 22 p inFIG. 2 . However, in actuality, the target value for driving theshake correction unit 95 causes the gain of the parallel shake correction target value to be changed by the image magnificationratio correction unit 25 p, the frequencycharacteristic change unit 15 p, and thesensitivity change unit 16 p. The “90% of the correction range” described herein is a value obtained by subjecting the parallel shake correction target value to the image magnificationratio correction unit 25 p, the frequencycharacteristic change unit 15 p, and thesensitivity change unit 16 p. The parallel shake correction targetvalue initialization unit 35 p adjusts the bias offset to the parallel shake correction target value in view of all these gain corrections. - According to the above-described first exemplary embodiment, attention is paid to the fact that the parallel shake amount is large during the composition checking period and the parallel shake amount during the short period of the image pickup is small at the time of the image pickup, and the
shake correction unit 95 is located at a position in the stroke at which the parallel shake correction can be performed. - To be more specific, the following configuration is adopted. The rotation
shake detection unit 96 p arranged to detect the rotation shake about the image pickup optical axis and the rotationshake computation unit 13 p arranged to process the rotation shake detection signal into the rotation shake correction target value are provided. Furthermore, the parallelshake detection unit 11 p arranged to detect the parallel shake in the plane surface perpendicular to the image pickup optical axis and the parallelshake computation unit 22 p adapted to process the parallel shake detection signal into the parallel shake correction target value are provided. Furthermore, theshake correction unit 95 adapted to correct the image shake generated on the image plane of the camera due to the rotation shake and the parallel shake based on the rotation shake correction target value and the parallel shake correction targetvalue initialization unit 35 p adapted to initialize only the parallel shake correction target value and the parallel shake correction target value are provided. Then, by initializing the parallel shake correction target value at the start of image pickup using the parallel shake correction target value initialization unit 35, the position of theshake correction unit 95 at the time of the image pickup start is set within the initialization range set within the shake correction range (within 90% of the complete stroke). - Also, the following configuration is adopted. The photographing
distance detection unit 19 arranged to detect a distance from the camera to the photograph object that is the target and the photographingdistance corresponding unit 36 p arranged to control the parallel shake correction targetvalue initialization unit 35 p based on the object distance detection signal are further provided. When the object distance is smaller than the set threshold value, the parallel shake correction targetvalue initialization unit 35 p is activated, and at the time of the image pickup start, theshake correction unit 95 is located within the initialization range of the shake correction range. - With the above-described configuration, it is possible to realize a small sized camera which can be developed into a consumer product. In other words, it is possible to provide a camera in which parallel shake in the plane perpendicular to the image pickup optical axis can be corrected with high accuracy while the small size and the light weight of the camera are maintained.
- According to the above-described first exemplary embodiment, at the time of the image pickup, only the parallel shake correction target value is initialized when the object distance is close (or, when the photographing magnification ratio is large). However, a case is not limited to such an example. At the time of the image pickup, both the parallel shake correction target value and the rotation shake correction target value may be initialized when the object distance is close (or, when the photographing magnification ratio is large). With this configuration, at the time of the image pickup, a possibility that the
shake correction unit 95 uses up the correction stroke can be set significantly low. -
FIGS. 10A to 10C are diagrams for describing the above configuration. The same parts as those inFIGS. 6A to 6C toFIGS. 8A to 8C are allocated with the same reference numerals and a description thereof will be omitted. Thewaveform 53 of the parallel shake correction target value inFIG. 10A is the same as that inFIG. 7A . However, according to a second exemplary embodiment, thewaveform 54 of the rotation shake correction target value inFIG. 10B is also initialized at the image pickup starttime point 56, and the initialization is cancelled at the end of the image pickup. - In this manner, at the image pickup start
time point 56, both the parallel shake correction target value and the rotation shake correction target value become 0, and outputs continue from that point. Thus, the integrated shake correction target value ofFIG. 10C is also set to 0 at the time of the image pickup start. That is, theshake correction unit 95 starts the image shake correction from 0 (optical axis center position) at the time of the image pickup start, and therefore during image pickup, theshake correction unit 95 does not exceed the correction limit range. -
FIG. 11 is a flowchart for describing the above-described operations. In principle, the flowchart is similar to the flowchart ofFIG. 5 . For that reason, the parts performing the same operations are allocated with the same step numbers, and a description thereof will be omitted. -
FIG. 11 is different fromFIG. 5 in that instead of Steps #1013 and #1015, Steps #1021 and #1022 are provided. - In Step #1021 of
FIG. 11 , the parallel shake correction target value and also the rotation shake correction target value are initialized (reset to zero). At the time of the image pickup start, respective appropriate bias offsets are added so that the target value becomes 0. Also, in Step #1022, the addition of the bias offsets is stopped and the initialization ends. - It is noted that herein, at the time of the image pickup start, the parallel shake correction
target value waveform 53 and the rotation shake correctiontarget value waveform 54 are reduced to 0, but as an alternative they may not necessarily be reduced all the way to 0. This is because the image pickup period is sufficiently short as compared with the composition checking period (inFIG. 6A , the period from the focused state to the image pickup period), and during the period, it suffices that the integrated shake correction target value does not exceed the correction limit. Hereinafter, a modified example of the above-described embodiment will be described. - In general, if about 10% of the correction stroke is left, the image pickup period does not use up the whole correction stroke. Therefore, at the time of the image pickup start, if the parallel shake correction
target value waveform 53 and the rotation shake correctiontarget value waveform 54 are reduced to be less than 90% of the correction entire stroke, there are no influences on the image pickup in mane cases. Accordingly, the fluctuation of the composition at the time of the image pickup can be decreased. That is, at the time of the image pickup start, in a case where the parallel shake correction target value and the rotation shake correction target value are below 90% of the entire correction stroke, the correction target value is used as it is. Only in a case where the shake exceeds this threshold value, the correction stroke is limited so that the parallel shake correction target value and the rotation shake correction target value are reduced to be less than 90% of the maximum available correction stroke. -
FIGS. 12A to 12C illustrate waveforms for explaining the above-described configurations and the same parts as those inFIGS. 8A to 8C are allocated with the same reference numerals. Thewaveform 53 of the parallel shake correction target value inFIG. 12A is initialized to a value at which about 10% of thecorrection limit 59 is left at the image pickup starttime point 56. For that reason, during theimage pickup period 57, the shake correction limit is not exceeded. - Similarly, the
waveform 54 of the rotation shake correction target value inFIG. 12B is also initialized to a value at which about 10% of thecorrection limit 59 is left at the image pickup starttime point 56. However, the rotation shake correctiontarget value waveform 54 in this drawing is not originally in the vicinity of the correction limit (the value is almost 0 and does not exceed 90% of the correction stroke). For that reason, in the state ofFIG. 12B , the rotation shake correction target value is not initialized (reset). Of course, in a case where the rotation shake correction target value at the image pickup starttime 56 exceeds 90% of the correction stroke, the initialization operation on the value (initialized to a value at which about 10% of the correction limit is left) is performed. - Both the parallel shake correction target value and the rotation shake correction target value are located within 90% of the correction stroke at the time of the image pickup. Thus, the integrated shake correction
target value waveform 55 ofFIG. 12C does not exceed the correction limit at the time of the image pickup and satisfactory shake correction is performed during the image pickup period. -
FIG. 13 is a flowchart showing the above-described operations and is basically similar to the flowchart ofFIG. 9 . For that reason, the parts performing the same operations are allocated with the same step numbers, and a description thereof will be omitted. -
FIG. 13 is different fromFIG. 9 in thatStep # 1023 is provided instead ofStep # 1020. - In
Step # 1011 ofFIG. 13 , the instruction of the image pickup start (turning ON of the switch S2) is performed. InStep # 1012, when it is determined that the object distance is close (the photographing magnification ratio is large), the flow is advanced to Step #1019. Then, inStep # 1019, it is determined whether the integrated shake correction target value at this moment is within 90% of the shake correction limit range. As a result, when the integrated shake correction target value is within 90%, it is unnecessary to initialize the parallel shake correction target value and the rotation shake correction target value, the flow is advanced to the image pickup inStep # 1014. Thus, when 90% of the correction range is exceeded or already the correction limit is exceeded, the flow is advanced to Step #1023. - In
Step # 1023, both the parallel shake correction target value and the rotation shake correction target value are initialized to be set within 90% of the correction range (the bias offset is added) so that at the time of the image pickup the integrated shake correction target value does not exceed the correction limit. - Here, in a case where the parallel shake correction target value and the rotation shake correction target value at the respective image pickup time points do not exceed the entire stroke (i.e. the correction limit), the initialization operation is not performed on the target values. In other words, in a case where the rotation shake correction target value in
FIG. 12B is almost 0 at the time of the image pickup start, the initialization operation is not performed. - In this manner, instead of setting the parallel shake correction target value and the rotation shake correction target value within 90% of the respective entire strokes, initializing the integrated shake correction target value may be performed instead.
-
FIG. 14 is a block diagram of a circuit configuration example for realizing the above-described structure, and the same parts as those inFIG. 2 are allocated with the same reference numerals. Here, instead of the parallel shake correction targetvalue initialization unit 35 p provided inFIG. 2 , inFIG. 14 , an integrated shake correction targetvalue initialization unit 151 p is provided. Then, the integrated shake correction target value output from thesensitivity change unit 16 p is input. An output of the integrated shake correction targetvalue initialization unit 151 p is sent to the shakecorrection drive unit 98 p. - Signals from the switch S2 and the photographing
distance corresponding unit 36 p in accordance with the full press operation of therelease member 93 a are input to the integrated shake correction targetvalue initialization unit 151 p. The ON signal of the switch S2 is input, and also, when the photographing distance is closer than a threshold value set by the photographingdistance corresponding unit 36 p and the photographing magnification ratio is large, it is detected whether the integrated shake correction target value at that time point is below 90% of the entire correction stroke. When 90% is exceeded, the initialization (resetting) is performed so that the integrated shake correction target value is less than 90% of the maximum stroke. -
FIG. 15 is a flowchart for describing the above-described operations.FIG. 15 is different fromFIG. 13 in that instead ofStep # 1023,Step # 1024 is provided. - In
Step # 1011 inFIG. 15 , the instruction of the image pickup start (turning ON of the switch S2) is performed. InStep # 1012, when it is determined that the object distance is close (the photographing magnification ratio is large), the flow is advanced to Step #1019. Then, inStep # 1019, it is determined whether the integrated shake correction target value at the current time point is below 90% of the shake correction limit range. As a result, when the integrated shake correction target value is below 90%, it is unnecessary to initialize the integrated shake correction target value. Thus, the flow is advanced to the image pickup inStep # 1014, when 90% of the correction range is exceeded or already the correction limit is exceeded, the flow is advanced to Step #1024. - In
Step # 1024, the integrated shake correction target value is reset to be below 90% of the correction range (the bias offset is added) so that during image pickup the integrated shake correction target value does not exceed the correction limit. - According to the above-described second exemplary embodiment, attention is paid to the fact that only when the photographing distance is close, is it likely that resetting is required. When the photographing distance is close, at the time of the image pickup, the
shake correction unit 95 is set to be located within 90% of the maximum correction stroke. - To be more specific, the units arranged to detect the shake (the rotation shake about the image pickup optical axis and the parallel shake in the plane surface perpendicular to the image pickup optical axis) (the
accelerometer 11 p and theangular accelerator 96 p) are provided. Furthermore, the units arranged to detect the shake (the rotation shake about the image pickup optical axis and the parallel shake in the plane perpendicular to the image pickup optical axis) (theaccelerometer 11 p and theangular accelerator 96 p) are provided. Furthermore, the units arranged to process the shake direction signals into the shake correction target values (the angularrate integration unit 13 p, thesensitivity change unit 16 p, and theacceleration integration unit 22 p) are provided. Furthermore, the units arranged to initialize or reset the shake correction target values (the parallel shake correction targetvalue initialization unit 35 p, and the integrated shake correction targetvalue initialization unit 151 p) and theshake correction unit 95 arranged to correct the image shake based on the shake correction target value are provided. Furthermore, the photographingdistance detection unit 19 arranged to detect the distance to the object and the photographingdistance corresponding unit 36 p arranged to operate the unit which initializes the shake correction target value based on the object distance detection signal are provided. Then, at the time of the image pickup start, by operating the photographingdistance corresponding unit 36 p to initialize (reset) the shake correction target value, at the time of the image pickup start, theshake correction unit 95 is set to be located at the initialization range which is set below 90% of the maximum shake correction range. - With the above-described configuration, it is possible to realize a small sized camera which can be developed into a consumer product. In other words, it is possible to provide a camera in which shake in the plane perpendicular to the image pickup optical axis can be corrected with high accuracy while the small size and the light weight of the camera are maintained.
-
FIG. 16 is a block diagram of a circuit configuration example of the camera according to a third exemplary embodiment of the present invention.FIG. 16 is different from the block diagram ofFIG. 2 in that instead of the parallel shake correction targetvalue initialization unit 35 p, a parallel shake correction target valuegain change unit 171 p is provided. - The signal response to the full press operation of the
release member 93 a (the ON signal of the switch S2) and the signal of the photographingdistance corresponding unit 36 p are input to the parallel shake correction target valuegain change unit 171 p. When the photographing distance is close (for example, 1:1 magnification photography) and also before the image pickup start (the period from the half press of therelease member 93 a to the full press), the gain of the parallel shake correction target value is set to half the value of the gain at the time of the image pickup. For that reason, the parallel shake correction target value is not set to be large before the image pickup and does not exceed the correction stroke limit. To be more specific, by passing through the parallel shake correction target valuegain change unit 171 p where a gain of 0.5 is set, the parallel shake correction target value is set to half of the original value. -
FIGS. 17A to 17C are diagrams for explaining the above-described target value waveforms. The same parts as before are allocated with the same reference numerals.FIG. 17A illustrates the parallel shake correctiontarget value waveform 53. As understood from the comparison withFIG. 6A , the gain of the target value before and after the image pickup period 57 (herein, about 1/10 second) is set to 0.5. That is, during image pickup preparation, complete parallel shake correction is not performed (the rotation shake is sufficiently corrected). Then, only during image pickup, gain=1 is set by the parallel shake correction target valuegain change unit 171 p, and the parallel shake correction target value is output. For that reason, at the image pickup start time point, the parallel shake correctiontarget value waveform 53 does not exceed the correction stroke and also the residual correction leftover for the parallel shake is not generated. However, during image pickup, satisfactory parallel shake correction is performed. -
FIG. 18 is a flowchart for describing the above-described operations. The flowchart of the previous flows and the parts performing the same operations are allocated with the same step numbers, and a description thereof will be omitted. - In
FIG. 18 , inStep # 1012, when the object distance is such that the photographing magnification ratio is equal to or larger than a predetermined value (for example, 0.5×), the flow is advanced to Step #1025. When the object distance is not such that the photographing magnification ratio is equal to or larger than the predetermined value, the flow is advanced to Step #1010. InStep # 1025, the parallel shake correction target value gain is set to half (0.5×). Next inStep # 1010, with the integrated shake correction target value of the rotation shake correction target value and the parallel shake correction target value in which the gain is changed in the above-described manner, theshake correction unit 95 is instructed to start the shake correction. - Next in
Step # 1011, when the operation for the image pickup start (turning ON of the switch S2) is performed, the flow is advanced to Step #1026, where the gain of the parallel shake correction target value is returned to the original value of 1. That is, at the time of the image pickup, sufficient parallel shake correction is performed. Next inStep # 1014, the image pickup is completed, and inStep # 1027, the gain of the parallel shake correction target value is reduced again to continue the shake correction. - According to this example, the gain change during image pickup preparation and at the time of the image pickup for the rotation shake in
FIG. 17B is not performed. However, for the purpose of ensuring the larger shake correction stroke during image pickup, the gain of the rotation shake correction target value may be set small up to a time before the image pickup as well. Alternatively, similarly toFIG. 14 , etc., the integrated shake correction target value gain is controlled. When the object distance is close (the photographing magnification ratio is large), during image pickup preparation, the gain of the integrated shake correction target value is set small to prevent the using up of the shake correction stroke. Then, only during image pickup, the integrated shake correction target value is set to an appropriate gain such that sufficient shake correction may be performed. - It is noted that the description has been provided of the above-described example in which the gain is set 0.5×, but the present invention is not limited to this example. A smaller gain may be provided during image pickup preparation, the gain of the parallel shake correction target value may be set 0 (the parallel shake correction target value is output only at the time of the image pickup). Hereinafter, a modified example of the above-described embodiment will be described.
-
FIGS. 19A to 19C are diagrams for explaining the above-described configurations. The parallel shake correction target value inFIG. 19A is not output before the imagepickup time point 56 and after the completion of theimage pickup period 57. The rotation shake correction target value inFIG. 19B is output during the image pickup preparation. For that reason, as the integrated shake correction target value inFIG. 19C , during the image pickup preparation, only the rotation shake correction is output, and in the image pickup period, the signals of the parallel shake correction and the rotation shake correction are output. That is, theshake correction unit 95 corrects only the rotation shake during the image pickup preparation and corrects the parallel shake and the rotation shake only in the image pickup period. - According to the above-described third exemplary embodiment, the configuration pays attention to the fact that while the parallel shake correction performance during the image pickup preparation is decreased (the gain is lowered), the shake correction stroke at the time of the image pickup can be optimized.
- To be more specific, the
gyro 96 p arranged to detect the rotation shake about the image pickup optical axis and the angularrate integration unit 13 p arranged to process the rotation shake detection signal into the rotation shake correction target value are provided. Furthermore, theaccelerometer 11 p arranged to detect the parallel shake in the plane surface perpendicular to the image pickup optical axis and theacceleration integration unit 22 p arranged to process the parallel shake detection signal into the parallel shake correction target value are provided. Furthermore, theshake correction unit 95 arranged to correct the image shake generated on the image plane of the camera due to the rotation shake and the parallel shake, based on the rotation shake correction target value and the parallel shake correction target value is provided. Furthermore, the parallel shake correction target valuegain change unit 171 p arranged to vary the gain of the parallel shake correction target value during the image pickup preparation state and at the time of the image pickup of the camera is provided. Up to the time before the image pickup start, the parallel shake correction target value gain is set low by the parallel shake correction target valuegain change unit 171 p. Therefore, up to the time before the image pickup start, theshake correction unit 95 is set to be located in the initialization range set below 90% of the maximum shake correction range. - Also, the photographing
distance detection unit 19 arranged to detect the distance to the object and the photographing distance corresponding unit 36 arranged to control the parallel shake correction target valuegain change unit 171 p based on the object distance detection signal are further provided. When the object distance is short, the parallel shake correction target value gain change unit is activated, and at the time of the image pickup start, theshake correction unit 95 is set to be located in the initialization range set within the shake correction range. - In addition, the
gyro 96 p arranged to detect the rotation shake about the image pickup optical axis and the angularrate integration unit 13 p arranged to process the rotation shake detection signal into the rotation shake correction target value are provided. Furthermore, theaccelerometer 11 p arranged to detect the parallel shake in the plane surface perpendicular to the image pickup optical axis and theacceleration integration unit 22 p arranged to process the parallel shake detection signal into the parallel shake correction target value are provided. Furthermore, theshake correction unit 95 arranged to correct the image shake generated on the image plane due to the rotation shake and the parallel shake, based on the rotation shake correction target value and the parallel shake correction target value is provided. Then, by theshake correction unit 95, the image shake is corrected up to the time before the image pickup based on the rotation shake correction target value. At the time of the image pickup, the image pickup is performed based on the rotation shake correction target value and the parallel shake correction target value. With this configuration, at the time of the image pickup start, the image shake correction performed by theshake correction unit 95 using the parallel shake correction target value is set to be located in the initialization range set within the shake correction range. - Also, the units arranged to detect the shakes (the rotation shake about the image pickup optical axis and the parallel shake in the plane surface perpendicular to the image pickup optical axis) (the
accelerometer 11 p and thegyro 96 p) are provided. Furthermore, the units arranged to process the shake detection signal into the shake correction target value (the angularrate integration unit 13 p, thesensitivity change unit 16 p, and theacceleration integration unit 22 p) are provided. Furthermore, theshake correction unit 95 arranged to correct the image shake generated on the image plane based on the shake correction target value and the photographingdistance detection unit 19 arranged to detect the distance to the object are provided. Furthermore, the shake correction target valuegain change unit 171 p arranged to vary the gain of the shake correction target value in the image pickup preparation state and at the time of the image pickup (or, a gain change unit (not shown) for the integrated shake correction target value) is provided. Furthermore, the photographing distance corresponding unit 36 arranged to operate the shake correction target valuegain change unit 171 p based on the signal of the photographingdistance detection unit 19 is provided. Then, up to the time before the image pickup start, the shake correction target value gain is set low by the photographing distance corresponding unit 36. Thus, up to the time before the image pickup start, theshake correction unit 95 is set to be located in the initialization range set within the shake correction range. - With the above-described configuration, it is possible to realize a small sized camera which can be developed into a consumer product. In other words, it is possible to provide a camera in which the parallel shake in the plane perpendicular to the image pickup optical axis can be corrected with high accuracy while the small size and the light weight of the camera are maintained.
- According to the first to third exemplary embodiments, the shake correction target value is initialized (reset) immediately before the image pickup, the shake correction target value is limited (the gain is set small) before the image pickup, such that the shake correction stroke at the time of the image pickup has a useful margin for operation below the maximum correction possible.
- In contrast, according to a fourth exemplary embodiment of the present invention, a configuration is adopted such that during the image pickup, if the shake correction stroke has no margin to provide additional correction, the image pickup is prohibited, and the image pickup is delayed until the shake correction stroke again is able to provide a useful margin. Thus, the degradation of the rotation shake correction accuracy at the time of the image pickup is prevented.
-
FIG. 20 is a block diagram of the camera according to the fourth exemplary embodiment of the present invention. Instead of the parallel shake correction target valuegain change unit 171 p inFIG. 16 , a photographingcontrol unit 211 p is provided. - The signal of the image magnification
ratio correction unit 25 p, the signal response to the full press operation of therelease member 93 a (the ON signal of the switch S2), and the signal of the photographingdistance corresponding unit 36 p are input to the photographingcontrol unit 211 p. Also, the parallel shake correction target value from the image magnificationratio correction unit 25 p is input to theadder unit 14 p as it is (the initialization or the gain change operation is not performed). Then, the photographingcontrol unit 211 p receives the above-described signal to control the photographing operation. - That is, the size of the parallel shake correction target value in the image magnification
ratio correction unit 25 p when the object distance is close (based on the signal of the photographingdistance corresponding unit 36 p) and also at the turning ON of the switch S2 (based on the signal of therelease member 93 a) is detected. When the amount exceeds 90% of the correction limit, the image pickup is prohibited and delayed. Here, the delaying of the image pickup means that the signal of the image magnificationratio correction unit 25 p is continuously detected from the release full press operation, and when the amount is within 90% of the correction limit, the image pickup is started. -
FIG. 21 is a flowchart for describing the above-described operations. The parts performing the same operations inFIG. 5 are allocated with the same step numbers, and a description thereof will be omitted. InFIG. 21 , Steps #1013 and #1015 inFIG. 5 are eliminated, andStep # 1028 is provided instead. - In
Step # 1011 inFIG. 21 , the full press operation of therelease member 93 a is performed to turn ON the switch S2. Next inStep # 1012, when the photographing magnification ratio is a predetermined value or higher (for example, 0.5× image pickup), the flow is advanced to Step #1028. InStep # 1028, the parallel shake correction target value signal of the image magnificationratio correction unit 25 p is regularly monitored, and when the value is smaller than 90% of the correction stroke, the flow is advanced to Step #1014, where the image pickup is started. However, if the value exceeds 90% of the correction stroke, the flow is circulated to Steps #1011→#1012→#1028 to stand by. - That is, when the photographing magnification ratio is equal to or greater than the predetermined value during the full press operation of the
release member 93 a, until the signal of the image magnificationratio correction unit 25 p is returned to 90% of the correction stroke, the image pickup is prohibited and delayed. In this way, by controlling the image pickup side, the degradation in the image shake correction accuracy at the time of the image pickup can be prevented. - It is noted that herein, the size of the parallel shake correction target value is used for the determination of the image pickup prohibition and delay, but the present invention is not limited to the above. In other words, the image pickup prohibition and delay may be performed in a case where the photographing magnification ratio is high and also the integrated shake correction target value (the signal of the
sensitivity change unit 16 p) exceeds 90% of the correction stroke at the time of the full press operation of therelease member 93 a (turning ON of the switch S2). - According to the above-described fourth exemplary embodiment, such a configuration is adopted that at the time of the image pickup, when the shake correction stroke does not have a useful margin for operation, the image pickup is prohibited, and until the shake correction stroke has a useful margin, the image pickup is delayed.
- To be more specific, the
gyro 96 p arranged to detect the rotation shake about the image pickup optical axis, the angularrate integration unit 13 p arranged to process the rotation shake detection signal into the rotation shake correction target value, and theaccelerometer 11 p arranged to detect the parallel shake in the plane surface perpendicular to the image pickup optical axis are provided. Furthermore, theacceleration integration unit 22 p arranged to process the parallel shake detection signal into the parallel shake correction target value, and theshake correction unit 95 arranged to correct the image shake generated on the image plane due to the rotation shake and the parallel shake based on the rotation shake correction target value and the parallel shake correction target value are provided. Furthermore, the photographingcontrol unit 211 p arranged to control the image pickup based on the size of the parallel shake correction target value is provided. Then, the photographingcontrol unit 211 p prohibits or delays the image pickup when the shake correction amount theshake correction unit 95 using the parallel shake correction target value exceeds the set ratio (90%) of the shake correction range. - With the above-described configuration, it is possible to realize a small sized camera which can be developed into a consumer product. In other words, it is possible to provide a camera in which the parallel shake in the plane perpendicular to the image pickup optical axis can be corrected with high accuracy while the small size and the light weight of the camera are maintained.
- While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all modifications, equivalent structures and functions.
Claims (15)
1. An image stabilizing apparatus, comprising:
a rotation shake detection unit configured to detect a rotation shake generated in a direction not parallel with an optical axis of the image stabilizing apparatus;
a first processing unit configured to process a detection signal of the rotation shake into a first correction amount;
a transitional shake detection unit configured to detect a transitional shake generated in a direction perpendicular to the optical axis of the image stabilizing apparatus;
a second processing unit configured to process a detection signal of the transitional shake into a second correction amount;
a shake correction unit configured to correct an image shake generated on an image plane of an image pickup apparatus based on the first correction amount and the second correction amount;
a change unit configured to change the transitional shake correction amount during the image pickup preparation to be lower than the transitional shake correction amount during image pickup.
2. The image pickup apparatus according to claim 1 , wherein the shake correction unit corrects the image shake based on the first correction amount without depending on the second correction amount before a focus operation of the image pickup apparatus is performed.
3. The image pickup apparatus according to claim 1 , wherein the shake correction unit begins to correct the image shake based on the first correction amount and the second correction amount during the image pickup preparation.
4. The image stabilizing apparatus according to claim 1 , wherein the change unit also changes the rotational shake correction amount during the image pickup preparation to be lower than the rotational shake correction amount during image pickup.
5. The image stabilizing apparatus according to claim 1 , further comprising a distance detection unit configured to detect a distance from the image pickup apparatus to an object, wherein the control unit moves the shake correction unit in a case where the distance detected by the distance detection unit is smaller than a given value.
6. An image stabilizing apparatus, comprising:
a rotation shake detection unit configured to detect a rotation shake generated in a direction not parallel with an optical axis of the image stabilizing apparatus;
a first processing unit configured to process a detection signal of the rotation shake into a first correction amount;
a transitional shake detection unit configured to detect a transitional shake generated in a direction perpendicular to the optical axis of the image stabilizing apparatus;
a second processing unit configured to process a detection signal of the transitional shake into a second correction amount;
a shake correction unit configured to correct an image shake generated on an image plane of an image pickup apparatus based on an integrated correction amount which is obtained by integrating the first correction amount with the second correction amount;
a change unit configured to change the integrated correction amount during the image pickup preparation to be lower than the integrated correction amount during image pickup.
7. The image pickup apparatus according to claim 6 , wherein the shake correction unit corrects the image shake based on the first correction amount without depending on the second correction amount before a focus operation of the image pickup apparatus is performed.
8. The image pickup apparatus according to claim 6 , wherein the shake correction unit begins to correct the image shake based on the integrated correction amount during the image pickup preparation.
9. The image stabilizing apparatus according to claim 1 , further comprising a distance detection unit configured to detect a distance from the image pickup apparatus to an object, wherein the control unit moves the shake correction unit in a case where the distance detected by the distance detection unit is smaller than a given value.
10. An image pickup apparatus, comprising:
a rotation shake detection unit configured to detect a rotation shake generated in a direction not parallel with an optical axis of the image stabilizing apparatus;
a first processing unit configured to process a detection signal of the rotation shake into a first correction amount;
a transitional shake detection unit configured to detect a transitional shake generated in a direction perpendicular to the optical axis of the image stabilizing apparatus;
a second processing unit configured to process a detection signal of the transitional shake into a second correction amount;
a shake correction unit configured to correct an image shake generated on an image plane of an image pickup apparatus based on the first correction amount and the second correction amount;
a change unit configured to change the transitional shake correction amount during the image pickup preparation to be lower than the transitional shake correction amount during image pickup.
11. An optical apparatus, comprising:
a rotation shake detection unit configured to detect a rotation shake generated in a direction not parallel with an optical axis of the image stabilizing apparatus;
a first processing unit configured to process a detection signal of the rotation shake into a first correction amount;
a transitional shake detection unit configured to detect a transitional shake generated in a direction perpendicular to the optical axis of the image stabilizing apparatus;
a second processing unit configured to process a detection signal of the transitional shake into a second correction amount;
a shake correction unit configured to correct an image shake generated on an image plane of an image pickup apparatus based on the first correction amount and the second correction amount;
a change unit configured to change the transitional shake correction amount during the image pickup preparation to be lower than the transitional shake correction amount during image pickup.
12. An image pickup apparatus, comprising:
a rotation shake detection unit configured to detect a rotation shake generated in a direction not parallel with an optical axis of the image stabilizing apparatus;
a first processing unit configured to process a detection signal of the rotation shake into a first correction amount;
a transitional shake detection unit configured to detect a transitional shake generated in a direction perpendicular to the optical axis of the image stabilizing apparatus;
a second processing unit configured to process a detection signal of the transitional shake into a second correction amount;
a shake correction unit configured to correct an image shake generated on an image plane of an image pickup apparatus based on an integrated correction amount which is obtained by integrating the first correction amount with the second correction amount;
a change unit configured to change the integrated correction amount during the image pickup preparation to be lower than the integrated correction amount during image pickup.
13. An optical apparatus, comprising:
a rotation shake detection unit configured to detect a rotation shake generated in a direction not parallel with an optical axis of the image stabilizing apparatus;
a first processing unit configured to process a detection signal of the rotation shake into a first correction amount;
a transitional shake detection unit configured to detect a transitional shake generated in a direction perpendicular to the optical axis of the image stabilizing apparatus;
a second processing unit configured to process a detection signal of the transitional shake into a second correction amount;
a shake correction unit configured to correct an image shake generated on an image plane of an image pickup apparatus based on an integrated correction amount which is obtained by integrating the first correction amount with the second correction amount;
a change unit configured to change the integrated correction amount during the image pickup preparation to be lower than the integrated correction amount during image pickup.
14. A image stabilizing control method, an image stabilizing apparatus using the image stabilizing control method comprises a shake correction unit correcting an image shake generated on an image plane of an image pickup apparatus, the method comprising:
detecting a rotation shake generated in a direction not parallel with an optical axis of the image stabilizing apparatus;
processing a detection signal of the rotation shake into a first correction amount;
detecting a transitional shake generated in a direction perpendicular to the optical axis of the image stabilizing apparatus;
processing a detection signal of the transitional shake into a second correction amount;
correcting an image shake generated on an image plane of an image pickup apparatus based on the first correction amount and the second correction amount;
changing the transitional shake correction amount during the image pickup preparation to be lower than the transitional shake correction amount during image pickup.
15. A image stabilizing control method, an image stabilizing apparatus using the image stabilizing control method comprises a shake correction unit correcting an image shake generated on an image plane of an image pickup apparatus, the method comprising:
detecting a rotation shake generated in a direction not parallel with an optical axis of the image stabilizing apparatus;
processing a detection signal of the rotation shake into a first correction amount;
detecting a transitional shake generated in a direction perpendicular to the optical axis of the image stabilizing apparatus;
processing a detection signal of the transitional shake into a second correction amount;
correcting an image shake generated on an image plane of an image pickup apparatus based on an integrated correction amount which is obtained by integrating the first correction amount with the second correction amount;
changing the integrated correction amount during the image pickup preparation to be lower than the integrated correction amount during image pickup.
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Families Citing this family (29)
Publication number | Priority date | Publication date | Assignee | Title |
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040056963A1 (en) * | 2002-09-24 | 2004-03-25 | Yoshikazu Ishikawa | Vibration correction for image sensing apparatus |
US20050001906A1 (en) * | 1998-06-26 | 2005-01-06 | Yasuhiro Sato | Apparatus for correction based upon detecting a camera shaking |
US20060018646A1 (en) * | 2004-07-21 | 2006-01-26 | Stavely Donald J | Method of compensating for an effect of temperature on a control system |
US20060140599A1 (en) * | 2004-12-28 | 2006-06-29 | Seiko Epson Corporation | Imaging apparatus and portable device and portable telephone using same |
US7639933B2 (en) * | 2005-06-15 | 2009-12-29 | Hoya Corporation | Stage apparatus and image movement correction apparatus for camera using stage apparatus |
US7639932B2 (en) * | 2005-11-16 | 2009-12-29 | Canon Kabushiki Kaisha | Imaging apparatus |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3628480A1 (en) * | 1985-08-23 | 1987-03-05 | Canon Kk | Method and device for compensating a movement of an image |
JP3189018B2 (en) | 1992-02-14 | 2001-07-16 | 株式会社ニコン | Camera shake prevention device |
JP3513950B2 (en) | 1993-12-14 | 2004-03-31 | 株式会社ニコン | Image stabilization camera |
JPH07281243A (en) * | 1994-04-04 | 1995-10-27 | Nikon Corp | Camera shake correction camera |
JPH11249185A (en) * | 1998-03-04 | 1999-09-17 | Nikon Corp | Camera system and interchangeable lens |
JP4031646B2 (en) * | 2002-01-15 | 2008-01-09 | 株式会社リコー | Imaging device |
JP2004301939A (en) * | 2003-03-28 | 2004-10-28 | Sony Corp | Camera system, camera, and interchangeable lens |
JP2004295027A (en) * | 2003-03-28 | 2004-10-21 | Nikon Corp | Blurring correction device |
JP2005086669A (en) * | 2003-09-10 | 2005-03-31 | Olympus Corp | Camera |
US7400825B2 (en) * | 2003-10-20 | 2008-07-15 | Matsushita Electric Industrial Co., Ltd. | Imaging device and method of controlling the same |
JP4717382B2 (en) * | 2004-06-15 | 2011-07-06 | キヤノン株式会社 | Optical equipment |
JP4667052B2 (en) | 2005-01-27 | 2011-04-06 | キヤノン株式会社 | Imaging device, camera body and interchangeable lens thereof |
-
2006
- 2006-12-12 JP JP2006335064A patent/JP4789789B2/en active Active
-
2007
- 2007-12-07 EP EP20120165395 patent/EP2482118A1/en not_active Withdrawn
- 2007-12-07 EP EP12155688.0A patent/EP2458426B1/en not_active Expired - Fee Related
- 2007-12-07 EP EP07122692A patent/EP1933189A1/en not_active Ceased
- 2007-12-07 US US11/952,945 patent/US8144203B2/en active Active
-
2012
- 2012-02-13 US US13/371,831 patent/US8471916B2/en not_active Expired - Fee Related
- 2012-02-13 US US13/371,751 patent/US8477201B2/en not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050001906A1 (en) * | 1998-06-26 | 2005-01-06 | Yasuhiro Sato | Apparatus for correction based upon detecting a camera shaking |
US7324134B2 (en) * | 1998-06-26 | 2008-01-29 | Ricoh Company, Ltd. | Apparatus for correction based upon detecting a camera shaking |
US20040056963A1 (en) * | 2002-09-24 | 2004-03-25 | Yoshikazu Ishikawa | Vibration correction for image sensing apparatus |
US20060018646A1 (en) * | 2004-07-21 | 2006-01-26 | Stavely Donald J | Method of compensating for an effect of temperature on a control system |
US20060140599A1 (en) * | 2004-12-28 | 2006-06-29 | Seiko Epson Corporation | Imaging apparatus and portable device and portable telephone using same |
US7639933B2 (en) * | 2005-06-15 | 2009-12-29 | Hoya Corporation | Stage apparatus and image movement correction apparatus for camera using stage apparatus |
US7639932B2 (en) * | 2005-11-16 | 2009-12-29 | Canon Kabushiki Kaisha | Imaging apparatus |
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EP1933189A1 (en) | 2008-06-18 |
EP2458426A1 (en) | 2012-05-30 |
US8477201B2 (en) | 2013-07-02 |
EP2458426B1 (en) | 2017-02-22 |
US8471916B2 (en) | 2013-06-25 |
EP2482118A1 (en) | 2012-08-01 |
US8144203B2 (en) | 2012-03-27 |
US20080136924A1 (en) | 2008-06-12 |
US20120147202A1 (en) | 2012-06-14 |
JP4789789B2 (en) | 2011-10-12 |
JP2008148160A (en) | 2008-06-26 |
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